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WorksheetsThe structure of matter
Total questions: 12
Worksheet time: 12mins
(a) came up with the atomic theory.
Elements are... (you can choose more than one answers)
Consist of atoms of two or more elements
Composed of the same type of atoms
Represented by atomic symbols
Represented by a chemical formula
How do we call the latest atomic model?
Thomson’s
”Plum pudding” model
Bohr model
Schrödinger’s
Quantum mechanical model
Rutherford’s “Planetary model”
The electrons have...
Particle-like behavior
Wave-like behavior
Particle- AND wave-like behavior
unpolite behavior
What's new in the latest atomic model?
the discovery of electrons
electrons move around the nucleus in waves
the discovery of nucleus
an atom is mostly empty space
If we compare the size of the nucleus to the atom's, it's like...
a grain of sand vs a sandbox
a grain of rice vs a bowl
a football vs the Earth
an ant vs a football field
The nucleus contains protons and...
(a)
The nucleus is...
positively charged
negatively charged
neutral
it depends
Choose the right answer about atoms.
An atom is made up of 4 types of subatomic particles.
All atoms are neutral.
Atoms can be positively or negatively charged.
The number of neutrons in an atom is always the same as the number of protons.
Choose the FALSE answer.
The atomic number of an element tells us the number of protons and the number of electrons as well.
The mass number is not the same as the atomic mass.
One element can have more mass numbers, but only one atomic number.
You can find both the atomic number and the mass number of an element in the periodic table.
Type examples for wave-like behaviour
How did the backscreen look like during the double-slit experiment with the two open slits (without a detector)?
